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Discussion Starter #1 (Edited)
86 js 300

i just bought an 86 js 300 from a friend a few weeks ago.. i know the ski runs, but it has been sitting for almost a year now, does anyone have any suggestions on what i should do before i try to fire it up??
 

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welcome to the forum

i would start with..

new gas
new plugs
make sure the motor turns and isnt seized
new charged battery
compression check
 

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Discussion Starter #3
i changed the plug & fuel.... fired it up today. almost started instantly. but i could only run it for about 30 secs. since i have it in a storage unit at the moment,& someone complained, & they told me to shut it down.

when i do a compression check on the js 300 what numbers im i looking for .... for good & bad compression?
 

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rseeguy said:
i changed the plug & fuel.... fired it up today. almost started instantly. but i could only run it for about 30 secs. since i have it in a storage unit at the moment,& someone complained, & they told me to shut it down.

when i do a compression check on the js 300 what numbers im i looking for .... for good & bad compression?

im not sure, it would be in the manual,,
 
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